module.exports = frob /** * Returns Frobenius norm of a mat2 * * @alias mat2.frob * @param {mat2} a the matrix to calculate Frobenius norm of * @returns {Number} Frobenius norm */ function frob(a) { return Math.sqrt( Math.pow(a[0], 2) + Math.pow(a[1], 2) + Math.pow(a[2], 2) + Math.pow(a[3], 2) ) }